A factory GM 5.565 400 cu in rod with ARP Bolts & Nuts will handle 500 hp. Reworked 5.700 rods with good botls will handle more.
I have never seen any offshore rod from anyone of any design that is steel that will not be good for 500 hp.
The Eagle H Beam rods seem to use a shoter bolt head than Scat or Cat does. As far as I am cincerned the Cat 4340 is as strong as the Eagle, Scat or other animals. I know nothing about the Hawk but am suspicious of it becuase of the similarity to the Eagle in logo and name. It is also a yet unknown. Elgin offered a 5140 rod like this Cat and I would bet it is the same with different name. Same as the 5140 cranks 4130 cranks etc.
It it was my own engine for that price and it being steel I would try out the Pro Comp rods. I would not try them in a customer engine though. I would also check them very thoroughly for maching quality before using them and as always wouldprefer an ARP Bolt or a Dorman HPX or Mr Gasket SPS Bolt.
I applaud you for trying to build a decent engine with no bucks. I specialize on doing more for less. I have done it all my life.
If anyone bought Chevy Pink Rods from JC Whitney, my bet is they were clones. GM didn't make all that manyof those. Like was said the Pink Rods were in the 1970 LT-1 engines and were in the 1969 302 cu in Camaro for IROC. All it was is a 5.7 rod that was like earlier said, double or triple magnaflux checked for cracks and were shot peened with better bolts in them. The reason of the Pink dabs or stripe was only for identification purposes for the assembler to recognize the rod was different and was for only a special engine and required different bolts. The marketing genious who decided on pink I am sure hoped the color would mean something, becuase in that day Ed Pink was one of the top name engine builders for Top Fuel and other competition only engines. Ed Pink had nothing to do with Pink getting chosen.
I have even seen pink Rods at swap meets that were fully painted pink. lol.
Ed